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A134795 Concatenation of first n positive oblong numbers. 0
2, 26, 2612, 261220, 26122030, 2612203042, 261220304256, 26122030425672, 2612203042567290, 2612203042567290110, 2612203042567290110132, 2612203042567290110132156, 2612203042567290110132156182 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Oblong numbers are also called promic, pronic or heteromecic (numbers).
LINKS
MATHEMATICA
Module[{nn=20, c}, c=2*Accumulate[Range[nn]]; Table[FromDigits[ Flatten[ IntegerDigits/@ Take[c, n]]], {n, nn}]] (* Harvey P. Dale, Sep 06 2015 *)
CROSSREFS
Cf. A007908, A132932. Oblong numbers: A002378.
Sequence in context: A156213 A159318 A318132 * A268667 A330032 A273381
KEYWORD
base,easy,nonn
AUTHOR
Omar E. Pol, Nov 26 2007
STATUS
approved

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Last modified April 20 17:12 EDT 2024. Contains 371845 sequences. (Running on oeis4.)