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

Author

M. F. Hasler, Mar 10 2015

Keywords

• nonn
• base

Comments

Counts the occurrences of n in A255850.

Links

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

Crossrefs

Cf. A255850, A061844, A055642.

Programs

PARI

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

Extensions

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