A332989 - OEIS

A332989

a(n) is the smallest number writable in n different ways as the sum of two distinct nonzero pentagonal numbers.

6, 211, 2999, 13352, 205427, 250927, 1134927, 2177527, 5002427, 6422352, 17349697, 30135652, 45997927, 55075502, 168570052, 130917177, 101275552, 249483677, 441561407, 433742427, 771789552, 1546505052, 1316582177, 1701923302, 2288827477, 1073520852, 3110207127

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OFFSET

1,1

COMMENTS

I conjecture this sequence is infinite.

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..40

EXAMPLE

211 can be written 35 + 176 and 1 + 210;

2999 can be written 852 + 2147, 247 + 2752, 117 + 2882;

13352 = P(52) + P(79) = P(29) + P(90) = P(17) + (93) = P(10) + P(94).

PROG