login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A186331 Adjusted joint rank sequence of (f(i)) and (g(j)) with f(i) after g(j) when f(i)=g(j), where f and g are the pentagonal numbers and the hexagonal numbers.  Complement of A186330. 4
1, 4, 6, 8, 10, 12, 14, 17, 19, 21, 23, 25, 27, 30, 32, 34, 36, 38, 40, 42, 45, 47, 49, 51, 53, 55, 58, 60, 62, 64, 66, 68, 70, 73, 75, 77, 79, 81, 83, 86, 88, 90, 92, 94, 96, 98, 101, 103, 105, 107, 109, 111, 114, 116, 118, 120, 122, 124, 127, 129, 131, 133, 135, 137, 139, 142, 144, 146, 148, 150, 152, 155, 157, 159, 161, 163, 165, 167, 170, 172 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..80.

EXAMPLE

First, write

1..5...12....22.....35......  (pentagonal)

1....6....15....28.......45.. (hexagonal)

Then replace each number by its rank, where ties are settled by ranking the pentagonal after the hexagonal:

a=(2,3,5,7,9,11,13,15,16,....)=A186330

b=(1,4,6,8,10,12,14,17,19,...)=A186331.

MATHEMATICA

(See A186330.)

CROSSREFS

Cf. A186328, A186329, A186330.

Sequence in context: A141109 A333197 A289426 * A258036 A242396 A061344

Adjacent sequences:  A186328 A186329 A186330 * A186332 A186333 A186334

KEYWORD

nonn

AUTHOR

Clark Kimberling, Feb 17 2011

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 26 05:07 EDT 2021. Contains 347664 sequences. (Running on oeis4.)