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A109750 Admirable triangular numbers. 0
66, 78, 120, 4095, 491536, 523776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No further term between 523776 and 4050045000. - R. J. Mathar, Feb 11 2008

LINKS

Table of n, a(n) for n=1..6.

FORMULA

A111592 INTERSECT A000217. - R. J. Mathar, Feb 11 2008

EXAMPLE

a(1)=66 because 11*(11+1)/2 = 66 and 1+2+3+11+22+33-6 = 66.

CROSSREFS

Cf. A111592.

Sequence in context: A095751 A121478 A128896 * A127654 A293175 A032485

Adjacent sequences:  A109747 A109748 A109749 * A109751 A109752 A109753

KEYWORD

more,nonn

AUTHOR

Jason Earls, Aug 11 2005

STATUS

approved

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)