A255851 Number of n-digit squares which remain squares if every digit is decreased by 1 (cf. A061844).

1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 3, 0, 0, 0, 0, 0, 0, 0, 1, 0, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 34, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0

Offset

1,20

Comments

Counts the occurrences of n in A255850.

Links

Lars Blomberg, Table of n, a(n) for n = 1..180

Prog

(PARI) a(n, A=A255850)=sum(i=1, #A, A[i]==n)

Crossrefs

Cf. A255850, A061844, A055642.

Sequence in context: A359561 A060282 A060283 * A334743 A078529 A180017

Adjacent sequences: A255848 A255849 A255850 * A255852 A255853 A255854

Keyword

nonn,base

Author

M. F. Hasler, Mar 10 2015

Extensions

Corrected a(30) and more terms calculated from A061844 by Lars Blomberg, Aug 21 2016

Status

approved