A166727 Positive integers with English names ending in "r".

4, 24, 34, 44, 54, 64, 74, 84, 94, 104, 124, 134, 144, 154, 164, 174, 184, 194, 204, 224, 234, 244, 254, 264, 274, 284, 294, 304, 324, 334, 344, 354, 364, 374, 384, 394, 404, 424, 434, 444, 454, 464, 474, 484, 494, 504, 524, 534, 544, 554, 564, 574, 584, 594

Offset: 1

Author

Rick L. Shepherd, Oct 20 2009

Keywords

• easy
• nonn
• word

Examples

			Fifty-four (54) is a term; fourteen (14) is not a term (but is a term of A060228).
		

Crossrefs

Cf. A017317, A166726, A166728, A166729, A166730, A166731, A059093, A060228.

Programs

Python

def a(n): return (n-1)//9*100 + ((n-1)%9 + 1)*((n-1)%9 > 0)*10 + 4
print([a(n) for n in range(1, 55)]) # Michael S. Branicky, Apr 24 2021

Formula

A017317 MINUS {n | n = 14 mod 100}.

a(n) = a(n-9) + 100, for n >= 10. - Michael S. Branicky, Apr 24 2021