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A073216 The terms of A055235 (sums of two powers of 3) divided by 2. 2
1, 2, 3, 5, 6, 9, 14, 15, 18, 27, 41, 42, 45, 54, 81, 122, 123, 126, 135, 162, 243, 365, 366, 369, 378, 405, 486, 729, 1094, 1095, 1098, 1107, 1134, 1215, 1458, 2187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

n such that 3 is the largest power of 3 dividing binomial(3n,n). - Benoit Cloitre, Jan 01 2004

Equals A023745 + 1.

This sequence is A007051 together with its (successive) multiples by (powers of) 3. - R. K. Guy, Oct 08 2011

REFERENCES

C. Armana, Coefficients of Drinfeld modular forms and Hecke operators, Journal of Number Theory 131 (2011), 1435-1460.

LINKS

Table of n, a(n) for n=1..36.

C. Armana, Coefficients of Drinfeld modular forms and Hecke operators

FORMULA

(3^n + 3^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.

EXAMPLE

a(4) = 5 = (3^2+3^0) / 2

CROSSREFS

Cf. A055235, A007051, A023745.

Sequence in context: A087900 A101216 A175095 * A181902 A278707 A059454

Adjacent sequences:  A073213 A073214 A073215 * A073217 A073218 A073219

KEYWORD

easy,nonn

AUTHOR

Jeremy Gardiner, Jul 21 2002

EXTENSIONS

Edited by Jeremy Gardiner, Oct 08 2011

STATUS

approved

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Last modified March 25 07:34 EDT 2017. Contains 284047 sequences.