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A274463 Subsequence of the automorphic numbers (A003226) with initial term 5 and such that a(n+1) ends with the digits of a(n). 2
5, 25, 625, 12890625, 6259918212890625, 4106619977392256259918212890625, 80863811000557423423230896109004106619977392256259918212890625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

An automorphic number is a number whose square ends in the same digits as the number itself.

The next term has 126 digits.

LINKS

Colin Barker, Table of n, a(n) for n = 1..10

Wikipedia, Automorphic number

PROG

(PARI)

seq(m, maxn) = L=List(); for(j=1, maxn, listput(L, m); m=(3*m^2-2*m^3)%10 ^ (2*sizedigit(m))); Vec(L)

seq(5, 8)

CROSSREFS

Cf. A003226, A274464.

Sequence in context: A215118 A218150 A176594 * A279835 A169652 A137114

Adjacent sequences:  A274460 A274461 A274462 * A274464 A274465 A274466

KEYWORD

nonn,base

AUTHOR

Colin Barker, Jun 24 2016

STATUS

approved

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Last modified September 19 16:34 EDT 2021. Contains 347564 sequences. (Running on oeis4.)