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A296139
a(n) is the number of positive integers m such that m = n^d_1 + n^d_2 + ... + n^d_k where d_k represents the k-th digit in the decimal expansion of m.
3
1, 0, 1, 2, 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 2, 1, 1, 1, 2, 1, 3, 2, 1, 1, 3, 0, 2, 1, 2, 2, 3, 1, 3, 1, 3, 2, 1, 3, 0, 2, 1, 2, 0, 1, 0, 0, 1, 3, 3, 3, 0, 2, 3, 0, 2, 1, 0, 3, 2, 0, 2, 2, 5, 1, 3, 4, 2, 0, 3, 0, 1, 1, 2, 3, 0, 1, 1, 3, 0, 3, 0, 2, 5, 0, 1, 4, 0
OFFSET
1,4
LINKS
EXAMPLE
a(4) = 2 since 4624 = 4^4 + 4^6 + 4^2 + 4^4 and 595968 = 4^5 + 4^9 + 4^5 + 4^9 + 4^6 + 4^8 and these are the only such numbers (see A139410).
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Chai Wah Wu, Dec 06 2017
STATUS
approved