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A070312 a(1) = a(2) = 1; a(n) = a(n-1) + concatenation of a(n-2) and a(n-1). 0
1, 1, 12, 124, 12248, 12424496, 1224824848992, 124244962449649697984, 1224824848992248489924899299395968, 1242449624496496979842449649697984496979849798598791936 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

EXAMPLE

a(4) = a(3) + concatenation of a(2) and a(3) = 12 + 112 = 124.

MATHEMATICA

a[n_] := (a[n - 1] + FromDigits[ Join[ IntegerDigits[ a[n - 2]], IntegerDigits[ a[n - 1]]]]); a[1] = a[2] = 1; Table[ a[n], {n, 1, 10}]

CROSSREFS

Sequence in context: A331396 A209041 A155595 * A153427 A178626 A223322

Adjacent sequences:  A070309 A070310 A070311 * A070313 A070314 A070315

KEYWORD

base,nonn

AUTHOR

Joseph L. Pe, May 11 2002

EXTENSIONS

Edited by Robert G. Wilson v, May 14 2002

STATUS

approved

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Last modified June 5 09:57 EDT 2020. Contains 334835 sequences. (Running on oeis4.)