This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A086159 Number of partitions of n into the first three triangular numbers, 1, 3 and 6. 0
 1, 1, 1, 2, 2, 2, 4, 4, 4, 6, 6, 6, 9, 9, 9, 12, 12, 12, 16, 16, 16, 20, 20, 20, 25, 25, 25, 30, 30, 30, 36, 36, 36, 42, 42, 42, 49, 49, 49, 56, 56, 56, 64, 64, 64, 72, 72, 72, 81, 81, 81, 90, 90, 90, 100, 100, 100, 110 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Jan Snellman and Michael Paulsen, Enumeration of Concave Integer Partitions, J. Integer Seqs., Vol. 7, 2004. Index entries for linear recurrences with constant coefficients, signature (1,0,1,-1,0,1,-1,0,-1,1). FORMULA G.f.: 1/((1-x)*(1-x^3)*(1-x^6)) CROSSREFS Cf. A008620. Sequence in context: A079438 A123050 A113694 * A029048 A086160 A029047 Adjacent sequences:  A086156 A086157 A086158 * A086160 A086161 A086162 KEYWORD nonn AUTHOR Jan Snellman (Jan.Snellman(AT)math.su.se), Aug 25 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 25 12:55 EDT 2019. Contains 324352 sequences. (Running on oeis4.)