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A122627 n_t(n) where t() = triangular numbers A000217. 1
1, 2, 3, 4, 5, 6, 7, 8, 9, 55, 67, 80, 94, 109, 125, 142, 160, 179, 199, 420, 463, 508, 555, 604, 655, 708, 763, 820, 879, 1395, 1489, 1586, 1686, 1789, 1895, 2004, 2116, 2231, 2349, 3280, 3445, 3614, 3787, 3964, 4145, 4330, 4519, 4712, 4909, 6375, 6631, 6892, 7158 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A122618 for notation.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

f[n_]:=FromDigits[IntegerDigits@n, n (n + 1) / 2]; Array[f, 64] (* Vincenzo Librandi, Sep 05 2016 *)

CROSSREFS

Sequence in context: A082743 A083838 A087082 * A122629 A083477 A069510

Adjacent sequences:  A122624 A122625 A122626 * A122628 A122629 A122630

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Sep 21 2006

STATUS

approved

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Last modified January 21 03:58 EST 2022. Contains 350473 sequences. (Running on oeis4.)