A134778 Last digit of n alphabetically.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 1, 1, 6, 7, 1, 1, 0, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0, 3, 2, 3, 3, 3, 3, 3, 3, 3, 0, 1, 2, 3, 4, 4, 6, 7, 4, 9, 0, 1, 2, 3, 4, 5, 6, 7, 5, 9, 0, 6, 2, 3, 6, 6, 6, 6, 6, 6, 0, 7, 2, 3, 7, 7, 6, 7, 7, 7, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 9, 9, 6, 7, 9, 9, 0, 0, 0, 0, 0

Offset

0,3

Comments

Digits are decimal with names in English (see A000052). A134778(n)=A134777(n) iff n is a repdigit (n=A010785(m)), in which case a(n)=A010888(m), the repeated digit. a(n)=0 iff n is a member of A011540. a(n)=8 iff n is a member of A002282-{0}.

Links

Michael S. Branicky, Table of n, a(n) for n = 0..10000

Example

a(104) = 0 because the digits of 104 are 1 (one), 0 (zero) and 4 (four) and "zero" occurs after both "four" and "one" alphabetically.

Prog

(Python)
def alpha(n): return [8, 5, 4, 9, 1, 7, 6, 3, 2, 0].index(n)
def a(n): return sorted(map(int, str(n)), key=alpha)[-1]
print([a(n) for n in range(105)]) # Michael S. Branicky, Dec 12 2023

Crossrefs

Cf. A134777, A000052, A010785, A010888, A011540, A002282.

Sequence in context: A358647 A004430 A285094 * A118943 A010879 A179636

Adjacent sequences: A134775 A134776 A134777 * A134779 A134780 A134781

Keyword

base,easy,nonn,word

Author

Rick L. Shepherd, Nov 11 2007

Status

approved