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A101272
a(n) = n, n <= 6; a(n) = 6, n > 6.
4
1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
OFFSET
1,2
COMMENTS
Sequence of electron arrangements in the 2p, 3p, 4p and 5p atomic subshells.
Decimal expansion of 37037/30000. - Elmo R. Oliveira, May 07 2024
REFERENCES
A. Beiser, Concepts of Modern Physics, 2nd Ed., McGraw-Hill, 1973.
R. M. Tennent (Editor), Science Data Book, Oliver & Boyd, 1971.
LINKS
Dominika Závacká, Cristina Dalfó, and Miquel Angel Fiol, Integer sequences from k-iterated line digraphs, CEUR: Proc. 24th Conf. Info. Tech. - Appl. and Theory (ITAT 2024) Vol 3792, 156-161. See p. 161, Table 2.
FORMULA
a(n) = n, n <= 6; a(n) = 6, n > 6.
Euler transform of length 6 sequence [ 2, 0, 0, 0, 0, -1]. - Michael Somos, Aug 31 2006
G.f.: (1-x^6)/(1-x)^2. - Michael Somos, Aug 31 2006
a(n) = min(n,6). - Wesley Ivan Hurt, Apr 16 2014
G.f.: x*(1+x+x^2+x^3+x^4+x^5)/(1-x). - Elmo R. Oliveira, Jun 20 2024
MATHEMATICA
Table[Min[n, 6], {n, 120}] (* Harvey P. Dale, Mar 09 2014 *)
PROG
(PARI) a(n)=min(6, n) /* Michael Somos, Aug 31 2006, edited by M. F. Hasler, Apr 16 2014 */
CROSSREFS
Cf. A040000.
Sequence in context: A293705 A036055 A034151 * A006160 A071640 A102674
KEYWORD
easy,nonn,changed
AUTHOR
Jeremy Gardiner, Dec 19 2004
STATUS
approved