A342781 - OEIS

A342781

Positions of words in A342753 in which 1st digit != last digit.

5, 6, 8, 9, 13, 15, 19, 20, 21, 24, 28, 29, 30, 31, 33, 36, 41, 43, 44, 45, 47, 48, 51, 54, 59, 62, 64, 65, 66, 67, 69, 71, 72, 75, 78, 81, 86, 89, 91, 93, 94, 95, 97, 98, 99, 101, 102, 105, 107, 108, 111, 114, 117, 123, 127, 130, 131, 134, 136, 137, 138

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Every positive integer is in exactly one of the sequences A342780 and A342781.

LINKS

Table of n, a(n) for n=1..61.

EXAMPLE

Positions of the first 8 words in which 1st digit != last digit can be read from a list of the first 16 words in A342753: 0, 00, 1, 000, 01, 10, 0000, 001, 100, 010, 00000, 11, 0001, 0100, 1000, 0010.

MATHEMATICA

(See A342753.)

CROSSREFS

Cf. A342753, A342781.

Sequence in context: A337143 A047439 A095763 * A187843 A155146 A308708

Adjacent sequences: A342778 A342779 A342780 * A342782 A342783 A342784

KEYWORD

nonn,base

AUTHOR

Clark Kimberling, May 07 2021

STATUS

approved