OFFSET

1,1

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

E. T. Wang and R. K. Guy, Problem E2429, Amer. Math. Monthly, 81 (1974), 1112-1113.

FORMULA

a(n) = A003509(n + 1) - 1. - Sean A. Irvine, Jun 04 2015

EXAMPLE

Since k(2) = 2 then a(1) = 2

Since k(3) = k(4) = k(5) = k(6) = 3 then a(2) = 6

Since k(7) = k(8) = ... = k(12) = 4 then a(3) = 12

Since k(13) = k(14) = ... = k(20) = 5 then a(4) = 20

Since k(21) = k(22) = ... = k(30) = 6 then a(5) = 30

Since k(31) = k(32) = ... = k(43) = 7 then a(6) = 43

CROSSREFS

KEYWORD

nonn,more

AUTHOR

EXTENSIONS

Edited by Herman Jamke (hermanjamke(AT)fastmail.fm), Mar 02 2008

STATUS

approved