OFFSET
1,2
LINKS
David Terr, On the Sums of Digits of Fibonacci Numbers, Fibonacci Quarterly 34, Aug. 1996, pp. 349-355.
PROG
(PARI) isok(n) = vecsum(digits(fibonacci(n+1)+fibonacci(n-1), 12)) == n; \\ Michel Marcus, Feb 18 2015
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved