1,1
Eric Weisstein's World of Mathematics, E
Cf. A032510, A036900-A036906.
Sequence in context: A108495 A178351 A152182 * A181364 A134494 A004370
Adjacent sequences: A036901 A036902 A036903 * A036905 A036906 A036907
nonn,base
Michael Kleber (michael.kleber(AT)gmail.com)
a(7) from Piotr Idzik (vil02(AT)o2.pl), Nov 01 2011