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A098840 Smith triangular numbers. 2
378, 666, 861, 2556, 5253, 7503, 10296, 16653, 27261, 28920, 29890, 32896, 46056, 72771, 84255, 85905, 92235, 94395, 120786, 132870, 141778, 157641, 215496, 328455, 345696, 385881, 386760, 396495, 424581, 529935, 533028, 588070, 654940 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

a(1)=378 because 378 is a Smith number as well as a triangular number.

MATHEMATICA

Rest[Select[Accumulate[Range[1500]], !PrimeQ[#]&&Total[IntegerDigits[#]] == Total[Flatten[ IntegerDigits/@Flatten[Table[#[[1]], {#[[2]]}]&/@ FactorInteger[ #]]]]&]] (* Harvey P. Dale, Oct 20 2012 *)

CROSSREFS

Cf. A006753.

Sequence in context: A064242 A116339 A225440 * A065702 A132648 A157116

Adjacent sequences:  A098837 A098838 A098839 * A098841 A098842 A098843

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Oct 10 2004

STATUS

approved

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Last modified April 27 10:45 EDT 2017. Contains 285512 sequences.